9 ¹/5
Если х=4/5, то 2(3,5х-2,5)+4,5х-1=7х-5+4,5х-1=11,5х-6=11,5*4/5-6=23*2/5=46/5=9+1/5
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9 ¹/5
Если х=4/5, то 2(3,5х-2,5)+4,5х-1=7х-5+4,5х-1=11,5х-6=11,5*4/5-6=23*2/5=46/5=9+1/5